fix: allow uploading files with uppercase extention

Author: yaroslav8765

custom/uploader.vue

@@ -194,7 +194,7 @@ const onFileChange = async (e) => {
   console.log('File details:', { name, extension, size, type });
   // validate file extension
   const allowedExtensions = props.meta.allowedExtensions || []
-  if (allowedExtensions.length > 0 && !allowedExtensions.includes(extension)) {
+  if (allowedExtensions.length > 0 && !allowedExtensions.includes(extension.toLowerCase())) {
     adminforth.alert({
       message: t('Sorry but the file type {extension} is not allowed. Please upload a file with one of the following extensions: {allowedExtensionsLabel}', {
         extension,

index.ts

@@ -281,7 +281,7 @@ export default class UploadPlugin extends AdminForthPlugin {
       handler: async ({ body }) => {
         const { originalFilename, contentType, size, originalExtension, recordPk } = body;
 
-        if (this.options.allowedFileExtensions && !this.options.allowedFileExtensions.includes(originalExtension)) {
+        if (this.options.allowedFileExtensions && !this.options.allowedFileExtensions.includes(originalExtension.toLowerCase())) {
           return {
             error: `File extension "${originalExtension}" is not allowed, allowed extensions are: ${this.options.allowedFileExtensions.join(', ')}`
           };